diff --git a/_includes/head.html b/_includes/head.html
index 5f471f0..25b3dfe 100644
--- a/_includes/head.html
+++ b/_includes/head.html
@@ -61,7 +61,7 @@
 {% endif %}
 
 {% if page.katex %}
-<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/katex@0.13.2/dist/katex.css" integrity="sha256-xkGWW9LkLeyOnuL6+COchlFwRPHO9tkh59ogotN8S7g=" crossorigin="anonymous">
+<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/katex@0.15.2/dist/katex.css" integrity="sha256-L+3lnjtX3yMb2iIZ86SbDdVrl4nOhB5kJkUqbKP4D2A=" crossorigin="anonymous">
 {% endif %}
 
 {% if page.toc %}